At present, with approximately 3,500 employees and 42 production facilities worldwide, HERZ-Group is one of the leading European manufacturers of valves, fittings, circuit regulating valves, dynamic control valves and thermostatic valves for domestic, heating, air conditioning, sanitary and gas installations. In addition, HERZ is one of the leading producers of biomass boilers up to 20,000 kilowatts and manufacturers of heat pumps, as well as a producer of insulation by its subsidiary Hirsch Servo AG.